With van der Poel back on top form after a late start to the 'cross season, van Aert feels the world championships may come down to a race for second-place.
Van Aert optimistic about return to form after five months out of racing, plans further 'cross races to sharpen legs for spring classics.
Van der Poel took a sixth-straight Dutch title and Cant took her 11th consecutive victory in Belgium. Sweeck took the Belgian men's title from a talent-packed field.
Alpecin-Fenix pair both took wins on Saturday and Sunday's races. Van Aert continued his strong comeback from injury with a fourth-place in Saturday's race.
Dutch team Jumbo-Visma found ways to be competitive across the entire WorldTour schedule, from the classics and the sprints to grand tours.
Van Aert put in a strong performance to finish fifth in his first race since injury, but remains uncertain about starting 'cross world championships in February.
Lucinda Brand pulled out after a heavy fall in the women's, Wout van Aert placed fifth in first race in five months in the men's.
Jumbo-Visma is rising to the forefront of the peloton across sprints, classics and grand tours as its riders embrace collective rather than individual ambition.
Four months after a career-threatening injury, van Aert and four teammates test equipment on the cobbles.